RouteShield-PNT is a bridge-network module that cross-checks GNSS position and time against independent shipboard evidence: radar, electronic chart data, dead reckoning, depth and an independent time source.
Its purpose is simple: when GNSS appears normal but the vessel is quietly drifting off the intended route, RouteShield-PNT helps the bridge team detect the inconsistency early and respond through standard, actionable bridge alerts.
Modern bridges depend heavily on GNSS for position, time and track-control context. When GNSS is jammed, spoofed or slowly manipulated, the bridge can still look normal while the vessel is already moving away from the intended track.
GNSS says the vessel is here. Do radar, chart, dead reckoning, depth and time agree?
RouteShield-PNT compares the GNSS claim with independent sources already available on or around the bridge. The system does not replace the officer. It provides a structured integrity check and turns weak signals into clear alert evidence.
Compares radar returns with coastline and fixed charted structures to detect position mismatch.
Checks whether heading and speed history agree with the GNSS movement claim.
Compares measured depth with expected charted depth where this check is meaningful.
Compares radar returns with coastline and fixed charted structures to detect position mismatch.
RouteShield-PNT is intended to act as a bridge alert source, not as another disconnected screen. Alerts are designed to follow Bridge Alert Management semantics and to be transported over bridge-network interfaces compatible with IEC 61162-450/-460 environments.
Public positioning:
detection latency in coastal waters
true-positive rate in harbour and coastal scenarios
false alarm per 12-hour watch
sustained GNSS time offset detection
The project path moves from replay-based bench testing to harbour and coastal pilots. The development focus is on repeatable scenarios, evidence logging, standards-aligned alerts and practical installation on bridge networks.
1
Bench replay and labelled scenarios.
2
Harbour pilot with operational bridge context.
3
Coastal pilot with varied geometry and nuisance-alert suppression.
4
Pre-compliance evidence for bridge alert and transport behavior.
A technical project overview covering motivation, architecture, independent checks, validation plan and bridge-network integration.
Use the Zenodo record as the public source of record, with this page acting as the short project introduction.
RouteShield-PNT is relevant for operators and technology partners who need a practical way to reduce single-point GNSS dependency on the bridge.
ELNAV.AI is interested in discussions with ferry, tug, feeder, coastal and offshore support operators; INS, ECDIS, radar and bridge-system OEMs; class, insurers and maritime safety stakeholders.
RouteShield-PNT is financed through the Loan Agreement (Loan No. 9558-HR) for the Digital, Innovation, and Green Technology Project (DIGIT Project), under the Call for proposals “Seal of Excellence under the Synergies Programme” (DIGIT.2.2.01).
The content of this page is the sole responsibility of ELNAV.AI d.o.o. and does not necessarily reflect the views of the World Bank.
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